Hi, We have a project where we have a PLC as Master to Robot as Slave over modbus and need to add a 3rd party machine over modbus. I am wondering is this is possible using different ports (502 as master and 503 as slave for example) [image] There are 2 tricky points to this. The machine is also …

This depends on your other devices. Would need a bit more detailed description of who is the master in which communication pairs. Example: PLC (Master) ↔ Robot(Slave) In this case if you are using ModbusTcp_any device for communicating with the robot then you need to set the Slave port of the Rob…

Using ETH port as Modbus Master and Slave

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tommi.piiparinen (Tommi Piiparinen) November 14, 2024, 1:25pm 2

Modbus TCP/IP can be used simultaniously as a Master and Slave.

For the master a port number is not specified, only slaves specify the modbus TCP port. Masters use an automatically assigned port for sending the requests.

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Communication between B&R Plc and Omron NX1P2

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Using ETH port as Modbus Master and Slave

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